Abstract:
The device allows the monitoring and diagnosis of the functioning of a system comprising a plurality of electrical sensors (3, 4) which produce two-level signals indicative of the condition of members which control the running of the engine and/or of respective monitored parameters or ranges, and an electronic monitoring and control unit (5) with a microprocessor (6), connected at input to the sensors (3, 4) and at output actuators (8) for causing the engine to stop and restart. The diagnostic device also includes interrogation means (6) for carrying out a succession of sequential cyclical scans of the outputs of at least some of the sensors (3,4), and for generating, at each scan, a serial signal (A) comprising a plurality of two-level signal portions, each indicative of the level of signal produced at the output of a respective sensor (3,4). A signalling device (2) is electrically connectible to the interrogation means (6) to convert the portions of the serial signal (A) into corresponding perceptible signals and permit the functioning of the stop-start device to the minitored and diagnosed.
Abstract:
L'invention concerne un système de téléchargement de données de programme sur un site ou dispositif de réception comprenant un calculateur de gestion de processus de ce dispositif à partir d'un central serveur. Le système comprend un circuit de réception (1) d'un signal analogique externe, sca, de commande d'amorçage du processus de téléchargement et un circuit (2) de validation du processus de téléchargement sur réception du signal sca précité. Un circuit de mémorisation (3) des données de programme est prévu, la mémorisation intervenant suite à la validation du processus de téléchargement. Application à la construction de dispositifs tels que des véhicules de tous types, notamment automobiles.
Abstract:
The voltage-regulator circuit (3) includes: a driver transistor (17) whose collector-emitter path is in series with the field winding (5) between two poles of a source (1) of a direct-current voltage (VBA), and a control circuit (10-16) adapted to drive the transistor (17) in an on-off manner in dependence on the value assumed by the voltage (V A ) supplied by the generator (2) in comparison with a reference voltage and in dependence on the field current detected by a resistor (19) connected to the transistor (17).
Abstract:
La présente invention concerne un procédé de filtrage d'un signal électrique, en particulier d'un signal de commande de logomètre pour véhicules automobiles, caractérisé par le fait qu'il comprend les étapes consistant à : comparer (100) chaque nouvelle valeur reçue d'un signal d'entrée (Xn) avec une valeur de sortie antérieure (Yn-1), comparer (106, 114) l'écart (A) détecté entre ladite nouvelle valeur reçue (Xn) du signal d'entrée et la valeur de sortie antérieure (Yn-1), avec une valeur seuil prédéterminée (P), mémoriser une valeur de consigne (Zn), rafraîchir la valeur de consigne mémorisée (Zn) en modifiant la valeur de consigne antérieure (Zn-1) de la valeur de seuil prédéterminée (P) si ladite valeur de seuil prédéterminée (P) est inférieure audit écart détecté (A), ou en modifiant la valeur de consigne antérieure (Zn-1) dudit écart détecté (A), si ladite valeur seuil prédéterminée (P) est supérieure audit écart détecté (A), et diviser (120) la valeur de consigne mémorisée (Zn) par une constante (K) pour former le signal de sortie (Yn).
Abstract:
The system comprises: at least one spark plug (SP), at least one ignition coil (8) whose secondary winding (9) is connected to the plug (SP) a power transistor (6) whose output path is in series with the primary winding (7) of the coil (8) between the two terminals of a direct-current voltage supply (V B ), and a control circuit (13) for switching the transistor (6) from the cut-off condition to the saturated condition to enable current to flow in the primary winding (7) of the coil (8) in order to generate a spark. Conveniently, the control circuit (13) is arranged to switch the transistor (6) progressively from the cut-off condition to the saturated condition, in dependence on the voltage detected between the terminals of its output path by the application of a driver signal (C,P) which is first continuous and then pulsed.
Abstract:
The signal provided by an accelerometric sensor (S) connected to the engine is monitored in two frequency bands (f1, f2) in which peaks indicative of the presence of knocking (pinking ) may appear. The intensity of the signal detected in the second band (f2) is compared (3) with the intensity of the signal detected in the first band (f1). The comparison (20) of the detection-signal component (F1 and/or F2) with the noise component (F3), in view of the emission of the knocking signal (21), is carried out in different ways (8, 13, 14) according to the relative ratios between the above intensities.